void setup() {
  Serial.begin(115200);
  pinMode(25,OUTPUT);
  pinMode(26,OUTPUT);
  pinMode(27,OUTPUT);
  pinMode(23,OUTPUT);
  pinMode(22,OUTPUT);
  pinMode(17,OUTPUT);
}

void loop() {

digitalWrite(25, HIGH);
digitalWrite(17, HIGH);
delay(3000);

digitalWrite(25, LOW);
digitalWrite(17, LOW);
digitalWrite(26, HIGH);
digitalWrite(22, HIGH);
delay(3000);

digitalWrite(26, LOW);
digitalWrite(22, LOW);
digitalWrite(23, HIGH);
digitalWrite(27, HIGH);
delay(3000);

digitalWrite(23, LOW);
digitalWrite(27, LOW);
digitalWrite(26, HIGH);
digitalWrite(22, HIGH);
delay(3000);

digitalWrite(22, LOW);
digitalWrite(25, LOW);
}